ISNAN

Purpose:

Returns 1 for each element that is a NaN value.

Syntax:

ISNAN(series)

Returns:

A series where each element is 1 where the input series is an NaN value and 0 where the input series is not an NaN value.

Example:

a = {1, 2, inf, nan};

b = 5;

c = {};

isnan(a) == {0, 0, 0, 1}

isnan(b) == {0}

isnan(c) == {}

Example:

a = isnavalue(nan);

b = isnan(nan);

a == 1

b == {1}

Remarks:

Unlike ISNAVALUE, ISNAN always returns a series.

ISNAN returns an empty series if the input is an empty series.

Use NAN or NAVALUE to create an NaN value.

See ANYNAN to determine if the input or any element of the input is NaN.

See Also:

ANYNAN

FINITE

INF

ISEMPTY

ISINF

ISNAVALUE

NAFILL

NAN

REMOVENA

SETNAVALUE